Buying Another Battery

[Monkey Dog]

I run two bikes & both use the same battery type.
I'm tempted to buy a third battery to also use along side the other two. One of the batteries is now on 83% health & the newer one is still on 100% health.
Is 83% getting towards a problematic battery & do you think it wise to get a third?
I alternate between both bikes for my daily commute so they're always in use, with weekend ride outs too.

 

[thecremeegg]

How old is the 83% battery out of interest? They tend to have a warranty as it should take a certain time to get to that percentage, worth checking!

 

[Monkey Dog]

How old is the 83% battery out of interest? They tend to have a warranty as it should take a certain time to get to that percentage, worth checking!

It's a few years old now so out of warranty.

 

[Husky430]

Are they Shimano 504 watt hour external batteries? Just wondering if you get a cycle count on your app too? Have the same and just wondering...

 

[Monkey Dog]

Are they Shimano 504 watt hour external batteries? Just wondering if you get a cycle count on your app too? Have the same and just wondering...

Internal frame.